Engine Ignition System (H4DOTC) (Except Sti): Removal & Installation Subaru Impreza GH

REMOVAL

Sparkplug: Refer to "SPECIFICATION" for the spark plug. Ref. to SPECIFICATION , General Description.

Scheme 40

Scheme 41

1. Disconnect the ground cable from battery.
2. Remove the air cleaner case. Ref. to «REMOVAL»(ref-357235-S04762520242010031100000) , Air Cleaner Case.
3. Disconnect the connector from ignition coil.
4. Remove the ignition coil. NOTE: Turn #3 ignition coil by 180 degrees to remove it.
5. Remove the spark plug with a spark plug socket.

Scheme 42

Scheme 43

1. Remove the battery. Ref. to «REMOVAL»(ref-357234-S21509179942010031100000) , Battery.
2. Disconnect the air duct from the secondary air pump.
3. Remove the bolts that secure the air duct to the rocker cover LH, and lift the air duct.
4. Disconnect the connector from ignition coil.
5. Remove the ignition coil. NOTE: Turn #4 ignition coil by 180 degrees to remove it.
6. Remove the spark plug with a spark plug socket.

INSTALLATION

RH SIDE

Install in the reverse order of removal.

Tightening torque (Spark plug): 21 N.m (2.1 kgf-m, 15.5 ft-lb)

Tightening torque (Ignition coil): 16 N.m (1.6 kgf-m, 11.8 ft-lb)

LH SIDE

Install in the reverse order of removal.

Tightening torque (Spark plug): 21 N.m (2.1 kgf-m, 15.5 ft-lb)

Tightening torque (Ignition coil): 16 N.m (1.6 kgf-m, 11.8 ft-lb)

Tightening torque (Air pump duct): 9 N.m (0.9 kgf-m, 6.6 ft-lb)

Direct ignition type is adopted. Refer to "Spark Plug" for removal procedure. Ref. to REMOVAL , Spark Plug.

Install in the reverse order of removal.

Tightening torque: 16 N.m (1.6 kgf-m, 11.8 ft-lb)